|Age||Presumably in his early 20's|
He flirts with pretty women excessively and is shown to be quite a playboy. He is also quite shallow, as he's only interested in Kyoko after hearing and seeing that she looks well when made up to be attractive.
The fact that he is not easily dissuaded comes through when he still pursues Kyoko after both missing his chance to see her in Natsu make-up on the Dark Moon set, and her rejection of him when she realized his asking her to date was serious.
Kijima likes kids. He played with some child actors on the set when he didn't have to. Ren and Yashiro commented about how he must like children because he was still able to go on playing as if nothing was wrong after being punched hard when a kid got carried away.
Kijima Hidehito looks over at on-lookers of the Dark Moon set, which makes them squeal. Kijima then talks to Ren about the on-lookers at their shoot, and that he is not happy about it because there are some males among them. Ren laughs a little and replies, "You haven't changed." Kijima then looks like he just realized something. He says that when the story develops further, to the point that Mio becomes Mizuki's ally, there will be even more on-lookers, including guys for Mio and Mizuki.
Kijima then stops and thinks that maybe only Mizuki, Momose Itsumi, will get the male on-lookers and not Mio. He adds on that Mizuki is more charming than Mio. Kijima then asks if he knew Airi Oohara's phone number, which Ren replies no to. This shocks Kijima and says "What?! You're her fiancé! Come on!", referring to their characters, Katsuki and Misao. Kijima then asks for Momose's phone number, which Ren replies in the negative to as well. This frustrates Kijima, and he calls Ren useless. Kijima then says that he would just ask them himself. Kijima walks over to Momose to have a chat with her. Yashiro pops up and describes Kijima as "annoying as usual." 
Later Kijima is seen playing with a child backstage, and Yashiro is surprised to see him in a positive light. 
On the Dark Moon transport bus, Yashiro, Ren, and Kijima are a few of the many cast and crew on board waiting for filming to be ready. They only have permission to shoot on the street for 2 hours. It might mean that Ren has only once chance to do the stunt.
A crew member calls to Ren from the front of the bus, telling him someone's come to see him. Yashiro and Ren move forward and are stunned to see Kyoko-as-Natsu. Others who are on the side of the bus look out through the windows and also exclaim at how mature and beautiful Kyoko is. She's complimented on how well she can transform into different roles. In the back of the bus, Hidehito Kijima hears the description of Kyoko's appearance and moves up the bus to get a look, as he can't imagine her to be mature.
Ren whisks Kyoko away unexpectedly, stunning the crew member who brought her and Yashiro. Yashiro is nonplussed until Kijima shows up behind him disappointed to have missed getting a look at Kyoko. Kijima, who'd never shown an interest in Kyoko before, is now openly discussing what she must have looked like and how his curious heart wants to see it. Yashiro is impressed at Ren's ability to sense Kijima and his motive and get Kyoko out of there. Later, Kijima was shown to be not happy or rather jealous, of how well Ren does his car stunt.
Kijima is in a taxi on the way to the Dark Moon party when he sees Kyoko walking and stops to ask what she is doing. Kijima then walks with Kyoko along with his manager. Kijima laughs when Kyoko says that she is afraid that the security won’t believe Kyoko is part of the cast since she is just dressed in her school uniform. Kijima thinks Kyoko is amusing.
Kyoko was just walking around and following Kijima not knowing where they were going. Kijima questions if she is even listening to him. Appalled that she was being disrespectful to a senior, Kyoko lies and replies that she was listening to every word properly. Kijima then asks if his suggestion is okay, which Kyoko answered yes, not knowing what’s happening—which is that Kijima asked her permission to dress her up for the party out of his own curiosity to see what the other cast got to see when she visited the set as Natsu. Kijima walks Kyoko into a salon, and tells them that he wants Kyoko to be twice as mature and beautiful. The hairdressers happily agree. Kyoko is picked up by the hairdressers and she is still oblivious to what is happening. Kijima is shocked by the results and his intitial thoughts are: Is this photoshopped? She's a stranger of the same height...  When she speaks he confirms it to be Kyoko. She asks him why he did it, and he admits the truth about his curiosity after her visit to the Dark Moon set. Kijama escorts her to the party.
He claims that he has a fondness for Kyoko and says that they should date. Kyoko rejected him by claiming she promised someone that she would save her purity. Even though she rejects him, he keeps chasing her.
While in shooting for a coffee commercial, Kijima again co-stars with Ren. While having lunch Kimija finds the taste of the new dessert on the menu to be an excuse to email Kyoko, shocking Yashiro. Ren questions about when he exchanged numbers with Kyoko. Kijima explains of how he used the second wrap up party While Ren was surrounded by female groups. She offered her mail ID after hearing from both Oohara and Itsumi that they usually exchange contacts. This leaves Yashiro in panic while Ren smiles his fake gentlemanly smile. Kyoko responds, as it was her first email from Kijima and a flashy one, too. The response mail to Kijima is also decorated with emoticons and gifs, which leaves both Yashiro and Ren unhappy. Yashiro realizes that Kijima simply changed his tactics with Kyoko, and inwardly claims that Kijima is a professional play boy.
Later on, Kijima unconsciously irritates Ren by asking him what Kyoko likes because Kijima doesn't know that Ren is in love with Kyoko. He casually asked if Ren knows of Kyoko's birthday by slyly asking him for a drink. He couldn't find any information from that year's talent directory and both Itsumi and Oohara told him to ask Kyoko herself.
Ren reveals it to be the 25th of December and also adds that he knows it because of his closeness to her. But Kimija deduces it to be a strict kohai/senpai relationship. Ren is finally provoked enough by Hidehito and states that he would rather call Kyoko to listen to her voice than only have her e-mail (which was what Kijima used to text with Kyoko). Kimija is left dumbfounded and suspecting that Ren is actually in love with Kyoko. Kijima is shocked because Ren hides his feelings well.
Ren and Kijima are often co-stars in many series and commercials. Though Ren finds him annoying, he doesn't express it towards him. Kijima often finds Ren to be useless in women's matters as Ren doesn't share any female co-star numbers. Ren was able to sense Kijima's intention when he was coming up from behind him to see Kyoko, which made him dashingly take Kyoko away, surpising Yashiro. Ren was getting increasingly irritated with Kijima for his advances towards Kyoko. After Kijima finds out directly from Ren that he is also interested in Kyoko, it's possible that Kijima decided to back down.
He completely shares Ren's opinion that Kijima is annoying. Yashiro express his annoyance when Kijima comments about Kyoko in a belittling way. He was even more shocked about Kijima's advances towards Kyoko.
Originally Dark Moon costars who didn't often interact. He doesn't think Kyoko is the type who would attract fans to the set. He is totally uninterested in her until becoming very curious after people started talking about how beautiful and mature she was when she visited the Dark Moon shoot location in her Natsu makeup.
Kijima develops an interest in Kyoko after overhearing that she can look older and more attractive. Determined to see this for himself, he unknowingly catches her lost in thought when he offers to pay for dolling her up for a Dark Moon party. They go together as friends, but Kijima looks for more than that. Kyoko laughingly agrees when he asks her out, thinking it is a silly joke, but later turns him down when she realizes he was serious. She continues a friendship with him, however, which includes exchanging emails and phone numbers. Kijima's intention is to still pursue her and wear her down into saying yes. He probably backed down after realizing the intense competition.
Though they never met, Sho is greatly annoyed with Kijima for his advances towards Kyoko. He saw the telecast of the Dark Moon wrap up party, during which Kyoko reveals that for fun Kijima paid to dress her up. Sho sees through to the intention behind Kijima doing this.
- Main article: Hidehito Kijima/Gallery
|Ren Tsuruga as Katsuki Tachibana • Itsumi Momose as Mizuki Hongo • Airi Oohara as Misao Hongo • Kyoko as Mio Hongo • Hiroko Iizuka as the Hongo Matriarch|
|Satoshi Takagi as the Hongo Patriarch • Hidehito Kijima as Naoyuki • Yoshiko as Misao's friend|